Excelsior-cutting machine



(No Model.)

0. G. SMITH.

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EXGELSIOR CUTTING MACHINE.

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C. G. SMITH. EXGELSIOR' CUTTING MACHINE. No. 580,732. Patented Dec. 11,1894.

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Patented Dec. 11, 1894.

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'EXOELSIOB, CUTTING MACHINE.

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UNITED STATES,

PATENT OFFICE.

CHARLES e. SMITH, OF DETROIT, MICHIGAN.

EXCELSIOR-CUT TING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 530,732, dated December1 1, 1 894. Application filed April 29, 1891. Renewed Jniie 18, 1894.Serial No. 514,992. (No model.)

Detroit, in the county of Wayne and State of Michigan, have invented newand useful Iniprovements in Excelsior-Cutting Machines; and I herebydeclare that the following is a full, clear, and exact descriptionthereof, ref-' erence being had to the accompanying draw lugs, whichform a part of this specification. My Invention relates to improvementsin that class of excelsior cutting machines, in

which the slitting and shaving knives are set in a reciprocating frameor sash, in such a manner as to out several layers of excelsior at eachreciprocation of the knife frame.

The objects of myinventiou are, first to provide means for slitting theface of the block into narrow strips; second, to provide means forcutting several shavings or layers ofexcelsior, from the block at everyreciprocation of the knife frame; third,to provide means to feed theblock to the cutting knives; and it consists in the form and arrangementof the slitting knives, in connection with each other, and theirrelation to the shaving knives; in the form and arrangementof theshaving knives or planes in theknife frame; and in the means for feedingthe block to be cut to the knives, and in the peculiar combination,construction and arrangement of the several parts as hereinafter moreparticularly set forth and claimed.

Figure 1,is a side elevation of my excelsior cutting machine. Fig. 2, isan'enlarged view of the ratchet feed on the line :12-00 in Fig. 1.

Fig. 3, is a plan view of the feed table. Fig. 4, is a side elevation ofthe knee on the feed table. Fig. 5 is a plan view of the knee on thefeed table. Fig. 6 is a horizontal section of the slitting knife bar.Fig. 7 is a vertical section of one side of the shaving knife frame.Fig. 8, is a plan view of a modification of the dogs. Fig. 9 is a sideelevation of the feed table and a modification of the dogs. Fig. 10, isa section through the feed table at the line :cw in Fig. 1. Fig. 11, isa rear view of the slitting knife bar detached from the knife frame. his.12, is a perspective view of my' excelsior cutting machine.

In the drawings A A represent the standiards of the main frame, whichare connected and held together by suitable cross ties or girths, or byother suitable means.

a a, are ribs on the inner sides of the stand- ,ards A A forming withthe steps ct a the studs or ways a a in which the knife frame ;:or sashB reciprocates.

a a are studs projecting from the inner side of the main standards whichare tapped for the reception of the set screws 0. a which hold the stepsa a in position, and by which any wear in the slides a o is taken up,and the cutting knife'frame always kept in proper relation to the feedplate, to insure the proper cut of the knives.

a is a set screw through a slot in the standard A and screwed into thesteps a a to secure them to the standard A.

BB' are the side posts of the knife frame or sash B, which are heldtogether by proper girths or cross-pieces.

bb b are inclined recesses in the posts B in which the knives or planeirons D are set, and held in place by the set screws b b.

d d are square shoulders on the ends of the knives D, which are insertedin the recesses b b in the posts of the knife frame. The knife bladebetween the shoulders is beveled on the lower side and ground to a sharpcutting edge.

d d are gage blocks placed in the inclined recesses 17 b in the post B,under the shoulders d d of the knife blades, to regulate the thicknessof the cut from the block, the difference in the depth of any twoconsecutive sets of gage blocks, being the thickness of the desired cutof the excelsior.

,F is a bar horizontally slotted andcarrying the slitting knives G andthe'spacing blocks g between the slitting knives. A recess is cut ineach endof the bar F on its inner side forming the shoulder f and thearm f which is perforated for the passage of the'screws or bolts bywhich the bar F is secured to the post B. p The slitting knives and thespacing blocks are inserted alternately in the slot f and secured inplace by the set screw f 3 tapped through the shoulder f or in any otherconvenient manner.

F is a plate on the back of the bar F covering the slot f and secured tothe bar by proper screws or bolts, and supporting the slitting knivesagainst the pressure of the block while cutting.

Vhenever it becomes necessary to remove any of the slitting knives itcan be readily and quickly done by removing the plate F and looseningthe set screw f H is a bar sliding in the vertical ways I' I on theouter side of the standard A, and actuated by the pitman J, which isreciprocated by an eccentric on the driving shaft of the main pitman ofthe machine.

K is a pawl jointed to the bar H in any suitable way, which engages withthe ratchet wheel L causing it to rotate during the downward stroke ofthe bar H. The ratchet wheel L is keyed onto the end of the shaft R.

A A are the standards or supports of the table M, which is in rear ofthe standards A A and carries the feed mechanism.

N is a bracket bolted on the side of the standards A and A and forms ajournal bearing 11 for the shaft R.

N is a bracket bolted on the side of the standard A at its rear edge andforms a j ournal bearing n for the shaft R.

n is a cap of the journal box it from which two standards a n arise,which are perforated to form journal bearing a n for the rock-shaft O.

0 is an arm at the outer end of the rockshaft 0 to which one end of thecoiled spring is is attached. The other end of this spring is attachedto the pawl K and holds itin contact with the ratchet wheel L while theblock to be cut is fed forward. 0 is an arm of the rock-shaft 0,extending downward and en gaging with the set lever P.

0 is an arm or lever of the rock-shaft extending outward and serves as ahand lever for operating the rock-shaft when necessary.

The ratchet wheel L is keyed on the front end and the gear-wheel S onand near the rear end of the shaft R.

S is a gear wheel pivoted on the axle s and serves to convey motion fromthe wheel S to the gear wheel S which drives the screw feed shaft T.

M is a standard arising from the center of the table M at its rear end,which is cored out to receive the hub V, which is internally screwthreaded to receive the feed shaft T, and is rotated by the wheel Swhich is firmly attached to it.

U is a guide or way in which the feed carriage reciprocates. u is thebase of the slide, and u a are the projecting edges of the way, underwhich the hooked foot y of the feed carriage Y catches.

Y is the feed carriage or plate, propelled by the feed shaft T which isconnected to it by the swivel joint 25. This carriage is provided withthe overhanging hooks y which extend below and under the overhangingledges it u of the carriage guide or way and hold the carriage down tothe table.

Yisa standard or plate projecting upward from the upper surface of thefeed carriage, and supports the plateY which extends across the frontedge of the feed carriage. 'y 'y are vertical slots in the edge of theplate Y in which the studs 5 on the dog Z travel.

Z is a dog for holding the block to be cut, and is provided with theteeth or serrations z for that purpose. This dog is raised and loweredby the lever E which is pivoted to the standard Y at e and is slotted atits outer end to engage with the pin 2 on the dog Z.

1-1 is a rack on the rear edge of the standard Y with which the springbolt h attached to the lever E engages to hold the dog Z down on theblock.

W is a stopon the sides of the carriage Y. which releases the lever Pwhenever the feed table reaches its limit.

P is a lever pivoted to the table M at p provided with the recess 10 andthe shoulder 19 on one side. When the machine is in operation the arm 0'of i the rockshaft O rests against the shoulder 13 and holds the springand the pawl K against the ratchet wheel L, causing the pawl to engagewith the notches or ratchets on the wheel at every reciprocation of thebar H. When the stop W on the feed carriage comes in contact with thelever P the opposite arm of the lever is forced outward and the shoulder19 releases the arm 0' and allows the rock-shaft to rock on itsjournals. This releases the tension of the spring 70 and that permitsthe pawl K to leave the ratchet wheel L, which ceases to rotate, and theforward movement of the feed carriage is arrested.

0 is a balance wheel on the extreme rear end of the shaft R, providedwith the handle c by which the operator turns the wheel backward andgigs back the feed table from the cutting frame, to allow of theinsertion of a new block to be cut. If required it may also be used tofeed the block forward by hand.

Figs. 8 and 9 show a modification of the feeding device or knee, inwhich Y is the feed carriage, propelled by the feed shaft T, which isconnected with it by the swivel joint 15. This carriage is provided withthe overhanging hooked foot 1 which extends below and under theoverhanging ledges a a of the carriage slide or way and holds thecarriage down to the table.

Y is a standard or plate projecting upward from the upper surface of thefeed carriage, and supports the plate Y which extends partially acrossthe front of the feed carriage and supports the block against thecutting knives.

y g are horizontal recesses cut in the sides of the plate Y at a pointjust above the center of its height.

Y is a plate extending across the rear end of the feed carriage havingat its foot and in the center the boss 11* which is cored out for thereception of the front end of the screw shaft T,to which it is connectedby a swivel joint.

g is a boss at the center of the upper edge IIO of the plate Y to whichthe curved levers Z is pivoted to the standard or plate Y at or on theboss Y. A toothed rack H projects 'from the plate Y opposite the boss ywith which a catch from the lever E engages, to lock the lever E whenthe dogs on the curved levers are inserted in the block to be cut.

Y is a boss on the center of the plate Y which is cored out andinternally screw threaded for the reception of the screw E 6 is a handwheel on the top of the screw, by which it is turned up or down.

e is a button on the screw head which projects far enough over the sideof the plate Y to come in contact with the top of the block, which isshown at B What I claim as my invention is- 1. In an excelsior cuttingmachine, the combination of the main frame A with the table M the ways Iin which the bar H recipr0- wheel L, the ratchet wheel L rotated by thepawl, spring k to keep the pawl in contact with the ratchet wheel, andthe rock-shaft O to which the spring is is attached by which the pawl Kis held in contact with or released from the ratchet wheel L and thefeed table Y and the mechanism through which motion is communicatedthereto, all substantially as described.

2. In an excelsior cutting machine the combination of the main frame Awith the table M the ways I in which the bar H reciprocates, the bar Hreciprocated by the pitman actuated by any proper mechanism on the maindriving shaft, and carrying the pawl K, the pawl K to engage with theratchet wheel L, the ratchet wheel rotated by the pawl K, the spring tokeep the pawl in contact with the ratchet wheel, the rock-shaft O, to anarm of which the spring is is attached, the set lever P which engageswith an arm of the rockshaft 0, and the stop W on thefeed carriage, thefeed carriage and the mechanism through which motion is communicatedthereto, all substantially as described. I

3. In an excelsior cutting machine, the combination of the main frame Awith the ways I in which the bar H reciprocates, the bar H reciprocatedby a pitman actuated by any proper mechanism on the main driving shaft,and carrying the pawl K, the pawl K to engage with the ratchet wheel L,the ratchet wheel L keyed onto the shaft R, the mechanism to communicatemotion from the shaft R to the screw feed shaftT, the screw feed shaft Tand the feed table Y, and the mechanism by which the pawl K is held incontact with and released from the ratchet wheel L all sub stantially asdescribed. 4. In an excelsior cutting machine the combination of themain frame A, with the ways I in which the bar H reciprocates, the bar Hcarrying the pawl K, the pawl K to engage with the ratchet wheel L, theratchet wheel L keyed onto the shaft R, the mechanism to convey motionfrom the screw feed shaft T, the screw feed shaft T propelling the feedtable Y, the feed table Y sliding on the ways on the table M, the stop Won the feed table Y, to engage with the set lever P, the set lever P,actuating the arm 0 of the rock-shaft O, the rock-shaft 0 provided withthe arms 0 and o and the spring 70 connecting the arm 0 of therock-shaft O, with the pawl K, all sub stantially as described.

5. In an excelsior cutting machine, the combination of the main framecarrying the cutting knives, with the table M, supporting the feedmechanism, the way U on the table M, provided with the over-hangingledges u u,

the feed carriage Y provided with the hooked foot Y, which catches underthe ledges u u, the standard Y and plate Y the slots y y in the standardY to receive the studs 2 on the dog Z, the dog Z, provided with thestuds 2 and actuated by the lever E and the lever E, pivoted to thestandard Y and locked in place by suitable mechanism, all substantiallyas described. 6. In an excelsior cutting machinethe combination of theparts of the knife frame provided with the inclined recesses, with thecutting knives, the set screws for retaining the knives in place, andthe gage blocks for regulating the cut of the knives, all substantiallyas described.

7. In an excelsior cutting machine, the combination of the parts of theknife frame provided with the inclined recesses for the reception of thecutting knives and the horizontal recesses for the slitting bar, theslitting bar carrying the slitting knives, the cutting knives insertedin the inclined recesses,

the meansfor holding them in recesses, and

CHARLES G. SMITH.

Witnesses:

E. O. PRYOR, W. A. BELL.

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